diff --git a/code/modules/power/antimatter/shielding.dm b/code/modules/power/antimatter/shielding.dm
index 01a45dbf0ba..ad248a7544a 100644
--- a/code/modules/power/antimatter/shielding.dm
+++ b/code/modules/power/antimatter/shielding.dm
@@ -34,8 +34,8 @@ proc/cardinalrange(var/center)
 	..(loc)
 	machines -= src
 	power_machines += src
-	sleep(10)
-	controllerscan()
+	spawn(10)
+		controllerscan()
 
 
 /obj/machinery/am_shielding/proc/controllerscan(var/priorscan = 0)
@@ -240,8 +240,8 @@ proc/cardinalrange(var/center)
 	w_type = RECYK_METAL
 
 /obj/item/device/am_shielding_container/attackby(var/obj/item/I, var/mob/user)
-	if(istype(I, /obj/item/device/multitool) && istype(src.loc,/turf))
+	if(ismultitool(I) && isturf(loc))
 		new/obj/machinery/am_shielding(src.loc)
 		qdel(src)
 		return
-	..()
+	..()
diff --git a/html/changelogs/PJB3005-AME-shielding-dupe-fix.yml b/html/changelogs/PJB3005-AME-shielding-dupe-fix.yml
new file mode 100644
index 00000000000..8759b4ec524
--- /dev/null
+++ b/html/changelogs/PJB3005-AME-shielding-dupe-fix.yml
@@ -0,0 +1,4 @@
+author: PJB3005
+delete-after: true
+changes:
+  - bugfix: You can no longer get multiple sections of AME shielding out of 1 package of AME shielding.
\ No newline at end of file